Hydnet - the specialist in intelligent hydraulic systems
Relief valve from Sun Hydraulics
Air-controlled, pilot-operated, balanced piston relief cartridges use compressed air over a diaphragm instead of an adjustable spring to control pressure setting. The air signal is supplied through a port in the hex-end of the cartridge. They are normally closed pressure regulating valves. When the pressure at the inlet (port 1) reaches the valve setting, the valve starts to open to tank (port 2), throttling flow to regulate the pressure. These valves are accurate, have low pressure rise vs. flow, they are smooth and quiet, and are moderately fast.
Note: Data may vary by configuration. See CONFIGURATION section.
| Cavity | T-3A |
| Series | 2 |
| Capacity | 50 gpm |
| Capacity (metric) | 200 L/min. |
| Maximum Operating Pressure | 2000 psi |
| Maximum Operating Pressure (metric) | 140 bar |
| Pilot Ratio | 20:1 |
| Maximum Valve Leakage at 110 SUS (24 cSt) | 3 in³/min.@1000 psi |
| Maximum Valve Leakage at 110 SUS (24 cSt) (metric) | 50 cc/min.@70 bar |
| Maximum Air Pressure | 150 psi |
| Maximum Air Pressure (metric) | 10,5 bar |
| Response Time – Typical | 10 ms |
| Valve Hex Size | 1 1/8 in. |
| Valve Hex Size (metric) | 28,6 mm |
| Valve Installation Torque | 45 – 50 lbf ft |
| Valve Installation Torque (metric) | 61 – 68 Nm |
| Model Weight | 0.53 lb. |
| Model Weight (metric) | 0.24 kg. |
| Seal kit – Cartridge | Viton: 990203006 |
Control
| A | External 1/4 NPTF Port |
Operating Range
| B | 50 – 1500 psi (3,5 – 105 bar) |
| I | 15 – 1000 psi (1 – 70 bar) |
Seal Material
| N | Buna-N |
| V | Viton |
